Log In
Search suggestions

    My Vehicles

    2001 BMW M5 5.0L SFI DOHC 8cyl

    My Store

    1720 S RIDGEWOOD A
    (386) 427-1210

    CLOSED Open at 7:30 AM

    SAVE 20% + GET A $20 GIFT CARD ON ONLINE SHIP-TO-HOME ORDERS OVER $100.

    Use Code: BLKFRIDAY

    See Details

    PCV Valve

    PCV Valve Operation:

    A vacuum-controlled metering device that regulates the flow of crankcase fumes in the positive crankcase ventilation system by allowing more flow at high speed than at low speed, and acts as a system shutoff in case of engine backfire to prevent an explosion in the crankcase.

    How To Instructions:

    Inspect - Check for obvious problems.
    Test - Give it an in-depth diagnosis.
    Replace - Out with the old, in with the new.

    Automotive Glossary
    Check out one of the largest dictionaries of automotive terms
    on the internet.

    AutoZone Logo